docs: def get_empty_color_config():
      """Return a color_config with all values set to None."""
      empty_color_config = ColorConfig(
          pound=None,
          heading=None,
          code=None,
          backticks=None,
          prompt=None,
          pound_reset=None,
          heading_reset=None,
          code_reset=None,
          backticks_reset=None,
          prompt_reset=None
      )
      return empty_color_config